Invalid json silently ignored

[Xodarap]

Describe the bug
if you put invalid json into a tool input, inspector will just silently drop that from what it sends to the MCP tool

To Reproduce
Steps to reproduce the behavior:

1. Choose a tool with some json input
2. type some random stuff in the field
3. see that the things you typed in do not get sent to the tool and no error appears

(Note that things work correctly if you manually click "Format JSON".)

Expected behavior
I think the validity check that Format JSON does should be run on blur, or at least on click of Run Tool